A.兩對(duì)邊支承的板是單向板，雙向受彎
B.當(dāng)長(zhǎng)邊與短邊之比小于或等于2時(shí)，應(yīng)按單向板計(jì)算
C.當(dāng)長(zhǎng)邊與短邊之比大于2但小于3時(shí)，宜按雙向板計(jì)算
D.當(dāng)按沿短邊方向受力的單向板計(jì)算時(shí)，應(yīng)沿長(zhǎng)邊方向布置足夠數(shù)量的構(gòu)造筋
E.當(dāng)長(zhǎng)邊與短邊長(zhǎng)度之比大于或等于3時(shí)，可按沿短邊方向受力的單向板計(jì)算